fix(transport.wsgi): JSON home doc missing GET and HEAD hints

GET and HEAD support was added for /v1/queues/{queue_name} but
the home document was not updated accordingly. This patch adds
those methods (AKA verbs) to the home document.

Change-Id: I82bbbf1b6d0735dc2d15faee715175fc724b9423
Merge "fix(transport.wsgi): JSON home doc missing GET and HEAD hints"